Sokomine/guide_arrow
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

upload

Browse Source
This commit is contained in:
Sokomine 2012-10-05 20:06:53 +02:00
commit f288556641
2 changed files with 167 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
README.md Normal file
View File

@ -0,0 +1,6 @@
Mod for Minetest that adds a guide which will lead you to specified coordinates
Not finished yet! Coordinates are hardcoded so far. May not work relieably.
To invoke the guide, type /guide in the chat. It looks like a MESE-node streched in hight.
If the distance between the guide and you grows too big, the guide will "beam" back to you.

161
init.lua Normal file
View File

@ -0,0 +1,161 @@
-- TODO: stop if player is idle
minetest.register_entity( "guide_arrow:arrow", {
hp_max = 1,
physical = false,
collisionbox = {-0.4, -1, -0.4, 0.4, 1, 0.4},
visual = "cube", --"upright_sprite",
visual_size = {x=1, y=2},
textures = {"signsplus_wooden_arrow_right.png","default_mese.png","default_mese.png","default_mese.png","default_mese.png","default_mese.png"},
makes_footstep_sound = true,
target = nil,
speed = nil,
range = nil,
range_y = nil,
after = nil,
after_param = nil,
sum_dtime = 0;
guide_owner = 0; -- player whose guide this is
guide_owner_name = 0;
has_sent_init_message = 0;
on_step = function(self, dtime)
-- it is enough to look about once per second if there is anything to do
self.sum_dtime = self.sum_dtime + dtime;
if( self.has_sent_init_message ~= 1 and self.guide_owner_name ~= nil ) then
self.guide_owner = minetest.env:get_player_by_name(self.guide_owner_name);
self.dtime_sum = 100; -- force guide to check positions
if( self.guide_owner ~= nil ) then
self.target = self.object:getpos(); -- has been created at the target position
minetest.chat_send_player(self.guide_owner_name, "guide_arrow: Hello "..tostring(self.guide_owner_name)..". I am your guide. Please follow me to coordinates "..
tostring( math.floor(self.target.x ))..","..tostring( math.floor(self.target.y ))..","..tostring( math.floor(self.target.z ))..
". If you loose sight of me, just wait until I reappear. You have to take care of the surrounding area on your own. "..
"If you want to get rid of me, just punch me once.");
self.has_sent_init_message = 1;
end
end
if( (self.guide_owner == nil or self.target == nil or self.guide_owner == 0)) then
self.object:remove();
else
if( self.sum_dtime > 1 and self.has_sent_init_message == 1 and self.guide_owner ~= nil and self.target ~= nil ) then
--minetest.chat_send_player("singleplayer", "guide_arrow: on_step called after "..tostring( self.sum_dtime ));
self.sum_dtime = 0;
-- get the location of the player
local pos = self.guide_owner:getpos();
local my_pos = self.object:getpos();
local dist_to_owner = ( (pos.x-my_pos.x)^2 + (pos.y-my_pos.y)^2 + (pos.z-my_pos.z)^2)^0.5;
-- if we got too far from the owner then beam back to him
if( dist_to_owner > 10 ) then
--minetest.chat_send_player(self.guide_owner_name, "guide_arrow: Please follow me.");
--minetest.chat_send_player(name, "guide_arrow: ".." You are at position "..
-- tostring( pos.x )..","..tostring( pos.y )..","..tostring( pos.z )..".");
-- at which direction is the player looking? after all he ought to see the arrow
local dir = self.guide_owner:get_look_dir(); -- getjaw() does not seem to work for players
--minetest.chat_send_player(name, "guide_arrow: ".." You are looking in direction "..
-- tostring( dir.x )..","..tostring( dir.y )..","..tostring( dir.z )..".");
-- get a place 3 nodes directly in front of the placer
local arrow_place_dist = 3;
local arrow_place_pos = {x=0, y=0, z=0};
arrow_place_pos.x = ( pos.x + (dir.x * arrow_place_dist ));
arrow_place_pos.y = ( pos.y+1 ); --+ (dir.y * arrow_place_dist ));
arrow_place_pos.z = ( pos.z + (dir.z * arrow_place_dist ));
--minetest.chat_send_player(name, "guide_arrow: ".." You are looking at point "..
-- tostring( arrow_place_pos.x )..","..tostring( arrow_place_pos.y )..","..tostring( arrow_place_pos.z )..".");
-- now we have to get a free node the arrow can appear at (inside a node would be impractical);
-- but going too high doesn't help either
local nt;
local offset = 0;
while( (nt == nil or nt.name ~= "air") and (offset<3) ) do
arrow_place_pos.y = arrow_place_pos.y + offset;
nt = minetest.env:get_node( arrow_place_pos );
offset = offset+1;
end
self.object:setpos( arrow_place_pos );
--minetest.chat_send_player(name, "guide_arrow: ".." First node that is not air (or as high above as we go) "..
-- tostring( arrow_place_pos.x )..","..tostring( arrow_place_pos.y )..","..tostring( arrow_place_pos.z )..".");
-- rotate guide so that it "faces" a direction 90 degree from its target
local diff = {x=self.target.x-arrow_place_pos.x, y=self.target.y-arrow_place_pos.y, z=self.target.z-arrow_place_pos.z};
local yaw = math.atan(diff.z/diff.x); --+math.pi/2;
if diff.z ~= 0 or diff.x > 0 then
yaw = yaw+math.pi;
end
self.object:setyaw( yaw );
--minetest.chat_send_player(name, "guide_arrow: ".." Guide rotating to "..tostring( yaw ).." degree.");
-- set speed
local vec = {x=0, y=0, z=0};
local amount = (diff.x^2+diff.y^2+diff.z^2)^0.5;
local speed = 3.0;
vec.x = diff.x*speed/amount;
vec.y = diff.y*speed/amount;
vec.z = diff.z*speed/amount;
self.object:setvelocity( vec );
--minetest.chat_send_player(name, "guide_arrow: ".." Guide starting to move.");
end
-- have we reached the target?
my_pos = self.object:getpos();
local dist_to_target = ((self.target.x-my_pos.x)^2 + (self.target.y-my_pos.y)^2 + (self.target.z-my_pos.z)^2)^0.5;
if( dist_to_target < 5 ) then
self.object:setvelocity( {x=0, y=0, z=0} );
minetest.chat_send_player(self.guide_owner_name, "guide_arrow: We have reached the target "..
tostring( math.floor(self.target.x ))..","..tostring( math.floor(self.target.y ))..","..tostring( math.floor(self.target.z ))..
", "..tostring( self.guide_owner_name )..". Thank you for having followed me!");
self.object:remove();
end
end
end
end;
});
minetest.register_chatcommand("guide", {
privs = {interact=true},
params = "[on|off|<target position>]",
description = "Show an arrow that guides you to your destination",
func = function(name, param)
-- actually place the guiding arrow
local target_pos = {x=100, y=15, z=120}; -- TODO: just a suitable testpos
-- local start_pos = minetest.env:get_player_by_name(name):getpos();
local arrow_entity = minetest.env:add_entity( target_pos, "guide_arrow:arrow");
minetest.chat_send_player(name, "guide_arrow: ".." Guide placed.");
-- initialize guide
arrow_entity:get_luaentity().guide_owner_name = name;
-- arrow_entity:get_luaentity().target = target_pos;
end
});